Is my SHO going to die

[SHOstopper]

Ok it was a sort of warm out the other day so i turned on my A/C. about 5 minutes later i pulled up to a red light. My car was making a wierd studdering noise i looked at my rpm guage and the needle started at one then dropped to one or two sticks above 0 then it would jump backup to one. I immediatly shut off the a/c and it stopped. then today i was at another stop light and the rpm needle moves up and down what is wrong with my sho is it not getting enough AIR OR WHAT

 

[luigisho]

Check for codes. Check for oil in plug wells. After that, since it happened at idle (red light) the IAB/IAC may not be performing well. There is a cleaning procedure on the shotimes faq. Also the tach jumping around is often a sign of crank sensor failure. Try cleaning the iab first since it's cheap and easy.

 

[Mike Kopstain]

Hi there. Is the idle jumping as well as the tach or is the idle steady when the tach goes nuts?

 

[Jungshoe]

I experienced those EXACT symptoms last year during the beginning of the summer season.

Replaced the idle air bypass valve and the problem went away.

 

[sdpatt]

First try to reset your idle programming. There may not be any problem with the components. Your description sounds like you had disconnected your battery and not reset the idle program.

One more time:
1) Disconnect the negative battery terminal.
2) Turn on the headlight switch.
3) Wait at least 10 minutes.
4) Turn off headlight switch.
5) Reconnect the negative battery terminal.
6) Start engine normally (never press on the gas pedal).
7) Allow idle speed to settle for at least 15 seconds.
8) Within 70 seconds of starting the engine, apply all accessory loads the engine will see at idle. Do these concurrently.
8a) Climate control to MAX A/C.
8b) Headlight switch ON.
8c) Turn steering wheel 1/2 turn side to side.
8d) Press brake pedal.
8e) ATX SHOs only: shifter to DRIVE.
9) Do not turn off engine for at least 5 minutes.
10) It is preferable that the car be driven immediately after setting the idle programming.
11) While driving, allow the coolant temperature to rise to the normal range.
12) Run the car through its entire performance range.